期刊
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
卷 95, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jngse.2021.104155
关键词
Cyclic olefin copolymer (COC); Metal organic framework (MOF); Mixed matrix membrane (MMM); Gas separation
资金
- TUBITAK, The Scientific and Technological Research Council of Turkey [112M122]
Thermoplastic based mixed matrix membranes prepared using cyclic olefin copolymer (COC) and metal organic frameworks (MOFs) showed promising gas separation performance, especially in the case of H-2/CO2 separation compared to pure COC. Gas permeation models were effectively used to predict the increase in H-2 gas permeability. Loading MOFs significantly enhanced gas permeability and ideal selectivity.
In this study, thermoplastic based mixed matrix membranes (MMMs) were prepared by using cyclic olefin copolymer (COC) and two different metal organic frameworks (MOFs), HKUST-1 and MIL-53(Al) via solution mixing (SM) and melt processing (MP) methods. Structural and physical properties of COC, MOFs, and MMMs were characterized by SEM, XRD, TGA, and DMA methods. H-2 and CO2 permeability values of MMMs were measured and ideal selectivity values (alpha) for H-2/CO2 were determined. Characterization studies confirmed that the both preparation methods yielded a strong interfacial adhesion between MOF particles and COC. Different semi-empirical gas permeation models including the Maxwell, Maxwell-Wagner-Sillar, Bruggeman, Pal, Lewis-Nielson, and Higuchi equations were used to fit relative increase in the gas permeation values of H-2 as a function of volume fraction of HKUST-1. It was found that the Higuchi model was successfully fit the increase in H-2 permeability. Loadings of 40 wt% of HKUST-1 and MIL-53 (Al) increased the H-2 permeability by 85 % and 59 %, respectively and significantly improved the ideal selectivity (alpha) of H-2/CO2, compared to COC. The gas separation performances of MMMs implied that the both series of COC/MOF membranes surpassed the Robeson's 2008 upper bound for H-2/CO2 separation.
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